Deck 23: Boilers

Question 1

Which of the following should a process technician do when monitoring and maintaining boilers?

A) Check burner flame color
B) Check draft balance
C) Check temperature gradient
D) All of the above

Answer 1

D
Explanation: A) Incorrect. Process technicians should check burner flame color, check draft balance, and check temperature gradient when monitoring and maintaining boilers.
B) Incorrect. Process technicians should check burner flame color, check draft balance, and check temperature gradient when monitoring and maintaining boilers.
C) Incorrect. Process technicians should check burner flame color, check draft balance, and check temperature gradient when monitoring and maintaining boilers.
D) Correct. Process technicians should check burner flame color, check draft balance, and check temperature gradient when monitoring and maintaining boilers.

Question 2

What section of the boiler is where the burners are located and where radiant heat transfer occurs?

A) Firebox
B) Burners
C) Air registers
D) Stack

Answer 2

A
Explanation: A) Correct. The firebox is the section of the boiler where the burners are located and where radiant heat transfer occurs.
B) Incorrect. Burners are devices used to mix and burn an air/fuel mixture in the firebox section.
C) Incorrect. Air registers control the flow of air to the firebox section of a boiler.
D) Incorrect. The stack is located at the outlet of the boiler, which removes flue gas from the boiler.

Question 3

What improper operation can lead to decreased boiler efficiency?

A) Loss of oxygen in boiler feed water
B) Failing to purge firebox
C) Opening pressured header drains and vents
D) Poor control of excess air and draft control

Answer 3

D
Explanation: A) Incorrect. Poor control of excess air and draft control can lead to decreased boiler efficiency.
B) Incorrect. Poor control of excess air and draft control can lead to decreased boiler efficiency.
C) Incorrect. Poor control of excess air and draft control can lead to decreased boiler efficiency.
D) Correct. Poor control of excess air and draft control can lead to decreased boiler efficiency.

Question 4

What term describes the tubes located in the firebox that transfer water from the steam drum to the mud drum?

A) Risers
B) Downcomers
C) Superheater
D) Desuperheater

Question 5

Where is the proper water level in a water tube boiler controlled?

A) Mud drum
B) Steam drum
C) Risers
D) Downcomers

Question 6

What is a system designed to control the temperature of steam leaving a boiler by using water injection through a control valve?

A) Risers
B) Downcomers
C) Superheater
D) Desuperheater

Question 7

Which improper operation can lead to eye injuries?

A) Loss of fuel gas or oil
B) Loss of boiler feed water
C) Opening pressured header drains and vents
D) Poor control of excess air and draft control

Question 8

What type of boilers work at higher operating pressures?

A) Fire tube
B) Straw tube
C) Water tube
D) Steam tube

Question 9

Which of the following improper operation can lead to an explosion in the firebox?

A) Loss of fuel gas or oil
B) Failing to purge firebox
C) Opening pressured header drains and vents
D) Poor control of excess air and draft control

Question 10

Which of the following factors does not affect boiler operation?

A) Pressure
B) Temperature
C) Water level
D) Viscosity of water

Question 11

What will occur in a fire tube boiler if the water level within the shell is not maintained?

A) Fire box could build up creosote
B) Tubes could build up soot
C) Tubes could overheat
D) Excess steam production could occur

Question 12

Which of the following is generally not powered by a steam turbine, which gets its energy provided by a boiler?

A) Pumps
B) Turbines
C) Cooling towers
D) Compressors

Question 13

What is the upper drum section of the boiler where the generated steam gathers before entering the separating equipment?

A) Mud drum
B) Steam drum
C) Desuperheater
D) Economizer

Question 14

Which of the following is less dense?

A) Steam
B) Hot water
C) Warm water
D) Cold water

Question 15

What principle do boilers use to assist fluid circulation?

A) Kinetic principle
B) Differential density
C) Mechanic principle
D) Hydro effect